ONT to JFK flight delays & on-time performance
Nonstop flights from Ontario International Airport to John F. Kennedy International Airport · 2,429 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ONT or JFK right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Ontario (ONT) to New York (JFK) arrived on time 70% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.8% were cancelled, and 14% arrived an hour or more late.
- JetBlue is the only airline reporting nonstop flights on this route.
- Departures scheduled around 10pm did best (81% on time); around 11pm did worst (61%).
- Monday was the most reliable day to fly (83% on time) and Sunday the least (64%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (68%).
Which airline is most on time from ONT to JFK?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| JetBlue | 70% | 1.8% | 59 min | 14.2% | 165 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 10pm81%74 flights
- 11pm61%91 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday83%0.0% cancelled
- Tuesday65%0.0% cancelled
- Wednesday70%0.0% cancelled
- Thursday71%0.0% cancelled
- Friday68%0.0% cancelled
- Saturday73%8.3% cancelled
- Sunday64%4.3% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)68%
- Late-arriving aircraft29%
- Air traffic control & airport congestion3%
- Security0%
- Extreme weather0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Air traffic control & airport congestion33%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
ONT to JFK: common questions
- How often are ONT to JFK flights on time?
- 70% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Ontario to New York cancelled?
- 1.8% of scheduled flights were cancelled (3 of 165).
- How long are typical delays?
- Across all flights the average arrival delay was 59 min (early arrivals count as zero). Flights that were late arrived 197 min behind schedule on average, and 14.2% of flights were an hour or more late.
- How long is taxi time at ONT?
- Flights on this route spent 13 min taxiing from the gate to takeoff on average.
Related routes
Return trip: JFK to ONT — 60% on time
More flights from Ontario
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ONT → JFK, nonstop flights by US airlines that report to the DOT. How we calculate this.